
/******************************************************************************
 * MODULE     : socket_notifier.cpp
 * DESCRIPTION: Notifiers for socket activity
 * COPYRIGHT  : (C) 2009 Massimiliano Gubinelli
 *******************************************************************************
 * This software falls under the GNU general public license version 3 or later.
 * It comes WITHOUT ANY WARRANTY WHATSOEVER. For details, see the file LICENSE
 * in the root directory or <http://www.gnu.org/licenses/gpl-3.0.html>.
 ******************************************************************************/
#ifndef QTTEXMACS

#include "config.h"

#if !defined(OS_MINGW) && !defined(OS_WIN)
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#endif
#include <errno.h>

#include "iterator.hpp"
#include "list.hpp"
#include "socket_notifier.hpp"

static hashset<socket_notifier> notifiers;

void
socket_notifier_rep::notify () {
  if (!is_nil (cmd)) cmd->apply ();
}

void
add_notifier (socket_notifier sn) {
  // cout << "enable notifier " << LF;
  notifiers->insert (sn);
}

void
remove_notifier (socket_notifier sn) {
  // cout << "disable notifier " << LF;
  notifiers->remove (sn);
}

void
perform_select () {
#if !defined(OS_MINGW) && !defined(OS_WIN)
  // FIXME: this can be optimizied
  while (true) {
    fd_set rfds;
    FD_ZERO (&rfds);
    int                       max_fd= 0;
    iterator<socket_notifier> it    = iterate (notifiers);
    while (it->busy ()) {
      socket_notifier sn= it->next ();
      FD_SET (sn->fd, &rfds);
      if (sn->fd >= max_fd) max_fd= sn->fd + 1;
    }
    if (max_fd == 0) break;

    struct timeval tv;
    tv.tv_sec = 0;
    tv.tv_usec= 0;
    int nr    = select (max_fd, &rfds, NULL, NULL, &tv);
    if (nr == 0) break;

    it= iterate (notifiers);
    while (it->busy ()) {
      socket_notifier sn= it->next ();
      if (FD_ISSET (sn->fd, &rfds)) sn->notify ();
    }
  }
#endif
}
#endif
